Buoy



FIG. 1 is a front perspective view of a buoy showing my new design;

FIG. 2 is a reduced scale left side elevational view thereof, the rightside being identical;

FIG. 3 is a reduced scale top plan view thereof;

FIG. 4 is a reduced scale front elevational view thereof;

FIG. 5 is a reduced scale rear elevational view thereof; and,

FIG. 6 is a reduced scale bottom plan view thereof.

The ornamental design for a buoy, as shown and described.